Dynamo-electric machine.



B. G. LAMME. DYNAMO ELECTRIC MAQHINE.

. APPLICATRON FILED SEPT- 10. 19Q9. May 11,

INNTOR B. G. LAMME. DYNAMG ELECRIC MACHINE. APPucATxoN man SEPT. le. 1909.

WITNESSES such a relative disposition of coils and core UNITED 'STATES' PATENT oniucn.

BENJAMIN G. LAMME, OF ITTSBURGH, PENNSYLVANIA, ASIG-NOR TO WEI'STINGHOUSI ELECTRIC AND MANUFACTURING COMPANY, A. CORPORATION OF PENNSYLVANI..

DYNAMO-ELECTRIC MACHINE.

Specification of Letters Patent.

Patented May 11, 1915.l

appiicaaontiea september io, i909. serial No. 517,108.

machines ai'id lparticularly to such machines as have ield magnets provided with com-- inutatingV poles and distributed comniutating, windings. v

The object of my invention is to provide a field magnet structure 'for dynamo-electric machines of the character abov'c indicated, the core laminaeot' which shall be so formed and assembled as to a'tford conipactness and simplicity otarrangementof parts and ease of assembling and one which shall insure parts as will permit of ready removal of such elements or parts as may be desired .for purposes of replacement or repair.

In the accompanying drawings, 'Figure l is an end elevation of a portion of a field 'magnet of a dyiian'io-electric machine con# Y big. 4 is a side elevation oi one. of the comsaine are supported.

mutating poles, its coil support and a portion ofthe main core segment by which the Fig. 5 is a view of a coil for one of the coininutating poles.

It has become a more or less common practice to provide both shunt and series direct current motors with auxiliary poles, intermediate the main field magnet poles, and to provide sucli poles with auxiliary `vindings in order to improve the commutation of the currents supplied to the motors under certain operating'conditions. It has also been -the practice, in some cases, toprovide direct current generators, which are operated at ings disposed in slots in, or adjacent to, the

faces of the pole pieces, iii order to compeny sate for the armature reaction in such ma'- cliines, and my present inventioncontemplates the employment of both the commutating poles ind the compensating windings above mentioned in connection with high speed generators, though I do not intend or desire to limit the use of my `invention to this partcula-1' type or kind of machine, since it may be utilized in connection with any machine, either generator lor motor, to which it may be structurally and electrically adapted.

The structural' details of my invention, which may, of course, be varied or `modified to such an extent as maybe desired Within the limits imposed/bv the statepf the art will now be set forthwith refereneelto the different figures of the drawings. f'

The fieldmagnet frame l, which may be a casing of any suitable form and dimensions, is provided on its interior with a series of pairs of inwardly projecting lugs 2 between which are slots or grooves of dove-tail shape to receive dove-tail lugs or projections .3, with which the segmental-core plates 4 are provided. Each segmental .core plate 4: has substantially parallel side edges 5 except for short distances adjacent to. its inner ends, where the edges 6 are radial, the dimensions being such that, when the plates are in yp0- sition, as indicated in Fig. l, the short portions 6 of the side edges of adjacent plates willbe in'. close contact and the triangular spaces 7 between the main portions 5 of the side edges will provide amplespace for the v4circulation of cooling currents of air. Each segmental core plate is provided with a central recess 8 of considerable size, which extends rearwardly from its'forward end and .an auxiliary pole piece 11. The pole pieces i 11 areheld securely in position by means of keys 12 which are driven in between the one side olE the` d ove-tail projection 10 and the correspoiidiiigicle of the recess 9 in which the projection is located. Mounted upon opposite sides of each auxiliary pole piece` are hangers 0r supporters 13. each of which is'` provided with end flanges 14 and similar iary coil being mounted upon` the support or hanger between the said fianges. The rear end of the hanger 13 is provided with beveled flanges 16 which are utilized to support the shunt coils 17 of the machine and are also provided with holes 18 to receive bolts 19 to fasten the hangers in position.

Each set of superposed plate segments 4 constitutes one-half of each of the two pole pieces of the machine, the shunt coil for each pole piece heingdisposed around these two portions and having its sides located vin the flanges 16 of the hangers 13, as indicated in Fig. 1.

The compensating windings 20 are disposed in partially closed slots 21 and 23 in the faces of the main pole pieces and are fastened and insulated therein by suitable wedges 22 of insulating material. The end portions of the compensating coils are bent into approximately U-shape substantially parallel to the end lof the core and around the recesses 8 in which are commutating ,poles and the sides vofthe shunt coils are located. The outside slots 23 in each main pole piece are made substantially twice the depth of the slots 21 vin order to receive the series coils 2li of the machine, as well as the compensating coils which pertain to these slots.

' It will be understood from the illustration and foregoing description that the various core parts and coils are so formed and assembled that a desirable economy of material and space are secured and ventilation of the parts insured. It will also be understood or repair able number of the that ready removal of any of the parts may be effected .for the purpose of replacement without disturbing any considerpartsthe removal of which is not desired. i

I claim as my invention: `1. A field magnet for a dynamo-electric machine having@J laminated core comprising a plurality of sets of superposed plates each of which constitutes parts of two adjacent main pole pieces and is provided with a central recess and Apole face slots, auxiliary pole pieces supported in said recesses, commutating coils for said auxiliary pole pieces,

main magnetizingA coils surrounding the main pole pieces and compensating coils disposed in said slots.

2. A field magnet for a dynamo-electric machine having a plurality/'of sets of superposed core plates each of which constitutes parts of two adjacent main pole pieces' and is provided with a central recess, main coils surrounding said pole pieces, auxiliary pole pieces seated in said recesses, coils for said auxiliary pole pieces, and hangers for said coilshaving flanges for supporting lthe main coils.

8 and supported by the beveledl 3. A field magnet for a dynamo-electric inachine having a cylindricall frame and a continuous cylindrical laminated core comprising a plurality of sets of superposed plates having substantially parallel side edges except adjacent to their inner ends where adjacent sets are in abutting engagement along radial planes to form a continuous pole face, each of said sets of plates constituting parts of two adjacent main pole pieces, whereby openings are provided between the cylindrical frame and portions of said core.

4:. A field magnet for a dynamo-electricmachine having a core composed of segmental laminae, auxiliary pole pieces supported by said segmental laminae, main coils, auxiliary coils, and hanger brackets mounted on the auxiliary pole pieces and having flanges for supporting both the main coils and the auxiliary coils.

5. A field magnet for a dynamo-electric machine having a laminated core provided with slots in its pole piece faces, compensating coils in all of said slots and series magnetizing coils in the slots which are ladjacent to the sides of the pole pieces.

6. In a field magnet for dynamo-'electric machines, a core having pole pieces provided with deep face slots adjacent to their sides and relatively shallow intermediate face slots, main magnetizing coils surrounding said pole pieces, compensating coils in all vof the face slots and series magnetizing coils in the deep face slots.

7. In a eld magnet for dynamo-electric machines, a segmental laminated'core having face slots in its main pole pieces and cominutating pole pieces between the main pole pieces, main magnetizing coils surrounding said pole pieces, compensating coils in the main pole piece slots, and series nliagnetizing coils in certain of the pole piece s ots. l

8. In a dynamo-electric machine, a eld vmagnet having a laminated core each of the main pole pieces of which is provided with two sets of face slots of unequal depth, compensating coils in all of said face slots, and series magnetizing coils in the deeper face slots. f

9. In a field magnet for dynamo-electric machines, the combination with a core provided with a plurality of main pole pieces having face slots therein, and main magnetizing coils surrounding said pole pieces, of compensating coils disposed in said slots and a second magnetizing coil. disposed iii the outer face slots concentric with said pole pieces.

10. In a field magnet for dynamo-electric machines, the combination with a core provided with a plurality of main pole pieces having face slots therein and main magnetizing coils surrounding said pole pieces, of

slots in yconcentric Arelation to said pole and 'in concentric relation to saidpole l0 g pieces. l K pieces. f

11. In a field magnet forl dynamo-electric In testimony whereof, I have hereunto machines, the combination With a core prosubscribed m name this 30th day of Aug., 5 vided with a, plurality of main pole pieces .1909.

having deep face slots adjacent to their v BENJ. G. LAMME. sides and relativelyV shallow intermediate Witnesses: Y slots, of one set of coils in said shallow slots E. LIVINGSTONE,

and a Second Set of coils in-said deep slots B. B. HINns. 

